<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>jQuery插件</title>
    <style>
        .div{
            width: 200px;
            height: 200px;
        }
    </style>
    <script src="../../jquery-js/jquery.js"></script>
    <script src="jquery-custom.js"></script>
    <script>
        $(function () {
          $('.div').bgColor('red');
        });
    </script>
</head>
<body>
<div class="div"></div>
<p>11111</p>
</body>
</html>